<template>
  <div class="menu-bar">
     <transition name="slide-up">
        <div class="menu-wrapper" :class="{'hide-box-shadow': ifSettingShow}" v-show="ifTitleAndMenuShow">
            <div class="icon-wrapper">
                <span class="icon-menu icon" @click="showSetting(3)"></span>
            </div>
            <div class="icon-wrapper">
                <span class="icon-progress icon"  @click="showSetting(2)"></span>
            </div>
            <div class="icon-wrapper">
                <span class="icon-bulb icon" @click="showSetting(1)"></span>
            </div>
            <div class="icon-wrapper">
                <span class="icon-word icon" @click="showSetting(0)"></span>
            </div>
        </div>
    </transition>
     <transition name="slide-up">
        <div class="setting-wrapper" v-show="ifTitleAndMenuShow && ifSettingShow">
            <div class="setting-font-size" v-if="showTag === 0" >
                <div class="preview" :style="{fontSize:fontSizeList[0].fontSize + 'px'}">A</div>
                <div class="select">
                  <div class="select-wrapper" @click="setFontSize(item.fontSize)" v-for="(item,index) in fontSizeList" :key="index">
                      <div class="line"></div>
                      <div class="pointer-wrapper">
                        <div class="pointer" v-show="defaultFontSize === item.fontSize">
                          <div class="small-pointer"></div>
                        </div>
                      </div>
                      <div class="line"></div>
                  </div>
                </div>
                <div class="preview" :style="{fontSize:fontSizeList[fontSizeList.length-1].fontSize + 'px'}">A</div>
            </div>
            <div class="setting-theme" v-else-if="showTag === 1">
              <div class="setting-theme-item"  
                v-for="(item,index) in themeList" 
                :key="index"
                @click="setTheme(index)"
                >
                <div class="preview" 
                  :style="{background: item.style.body.background}" 
                  :class="{'no-border': item.style.body.background !== '#fff'}"></div>
                <div class="text" 
                  :class="{'selected': index === defaultTheme}">{{item.name}}</div>
              </div>
            </div>
            <div class="setting-progress" v-else-if="showTag === 2">
                <div class="progress-wrapper">
                  <input class="progress" 
                    type="range"
                    max="100"
                    min="1"
                    step="1"
                    :disabled = "!bookAvailable"
                    @change = "onProgressChange($event.target.value)"
                    @input = "onProgressInput($event.target.value)"
                    :value="progress"
                    ref="progress">
                </div>
                <div class="text-wrapper">
                  <span>{{bookAvailable ? progress+ "%" : "加载中..." }}</span>
                </div>
            </div>
        </div>
    </transition>
    
    <transition name="fade">
      <div class="content-mask"
          v-show="ifShowContent"
          @click = "hideContent">
          <content-view :ifShowContent="ifShowContent"
              :v-show="ifShowContent"
              :navigation = "navigation"  
              :bookAvailable = "bookAvailable"
              @jumpTo = "jumpTo">
        </content-view>
      </div>
    </transition>
  </div>
</template>

<script>
  import  ContentView from './ContentView.vue'
  export default {
    name:'',
     props:{
        ifTitleAndMenuShow: {
          type: Boolean,
          default: false
        },
        fontSizeList:Array,
        defaultFontSize: Number,
        themeList:Array,
        defaultTheme: Number,
        bookAvailable:Boolean,
        navigation: Object
    },
    data () {
      return {
        ifSettingShow:false,
        showTag: 0,
        progress: 0,
        ifShowContent: false
      };
    },

    components: {
      ContentView
    },

    computed: {},

    beforeMount() {},

    mounted() {},

    methods: {
      showSetting(index){
        this.showTag = index;
        if(this.showTag === 3){
          this.ifSettingShow = false;
          this.ifShowContent = true;
        }else{
          this.ifSettingShow = true;
        }
      },
      hideSetting(){
        this.ifSettingShow = false;
      },
      setFontSize(fontSize){
        this.$emit('setFontSize',fontSize);
      },
      setTheme(index){
        this.$emit('setTheme',index);
      },
      //拖动进度条的事件
      onProgressInput(progress){
        this.progress = progress;
        this.$refs.progress.style.backgroundSize = `${this.progress}% 100%`;
      },
      //进度条拖动松开事件
      onProgressChange(progress){
        this.$emit(`onProgressChange`,progress);
      },
      hideContent(){
        this.hideSetting();
        this.ifShowContent =false;
      },
      jumpTo(target){
          this.$emit('jumpTo',target)
      }
    },

    watch: {
    }

  }

</script>
<style lang='scss' scoped>
@import '../assets/styles/global';
.menu-bar{
  .menu-wrapper{
    position: absolute;
    bottom: 0;
    left: 0;
    display: flex;
    width: 100%;
    height: px2rem(48);
    z-index: 101;
    background: white;
    box-shadow: 0 px2rem(-8) px2rem(8) rgba(0,0,0,.15);
    .icon-wrapper{
        flex: 1;
        @include center;
        .icon-word{
            font-size: px2rem(16);
        }
        .icon-bulb{
            font-size: px2rem(18);
        }
    }
    &.hide-box-shadow{
      box-shadow: none;
    }
  }
  .setting-wrapper{
    position: absolute;
    bottom: px2rem(48);
    left: 0;
    width: 100%;
    height: px2rem(60);
    background: white;
    box-shadow: 0 px2rem(-8) px2rem(8) rgba(0,0,0,.15);
    z-index: 101;
    .setting-font-size{
      display: flex;
      height: 100%;
      .preview{
        flex: 0 0 px2rem(40);
        @include  center;
      }
      .select{
        display: flex;
        flex: 1;
        .select-wrapper{
          flex: 1;
          display: flex;
          align-items: center;
          &:first-child{
            .line{
              &:first-child{
                border-top: none;
              }
            }
          }
          &:last-child{
            .line{
              &:last-child{
                border-top: none;
              }
            }
          }
          .line{
            flex: 1;
            height: 0;
            border-top: 1px solid #ccc;
          }
          .pointer-wrapper{
            position: relative;
            flex: 0 0 0;
            width: 0;
            height: px2rem(7);
            border-left: 1px solid #ccc;
            .pointer{
              position: absolute;
              top: px2rem(-8);
              left: px2rem(-10);
              width: px2rem(20);
              height: px2rem(20);
              border-radius: 50%;
              background: white;
              border: px2rem(1) solid #ccc;
              box-shadow: 0 px2rem(4) px2rem(4) rgba(0,0,0,0.15);
              @include center;
              .small-pointer{
                width: px2rem(5);
                height: px2rem(5);
                background: #000;
                border-radius: 50%;
              }
            }
          }
        }
      }
    }
    .setting-theme{
      height: 100%;
      display: flex;
      .setting-theme-item{
        flex: 1;
        display: flex;
        flex-direction: column;
        padding: px2rem(5);
        box-sizing: border-box;
        .preview{
          flex: 1;
          border: 1px solid #ccc;
          box-sizing: border-box;
          &.no-border{
            border:none;
          }
        }
        .text{
          flex: 0 0 px2rem(30);
          font-size: px2rem(14);
          color: #ccc;
          @include center;
          &.selected{
            color: #333;
          }
        }
      }
      
    }
    .setting-progress{
      position: relative;
      width: 100%;
      height: 100%;
      .progress-wrapper{
        width: 100%;
        height: 100%;
        @include center;
        padding: 0 px2rem(30);
        box-sizing: border-box;
        .progress{
          width: 100%;
          -webkit-appearance: none;
          height: px2rem(2);
          background:  -webkit-linear-gradient(#999,#999) no-repeat , #ddd;
          background-size: 0 100%;
          &:focus{
            outline: none;
          }
          &::-webkit-slider-thumb{
            -webkit-appearance: none;
            height: px2rem(20);
            width: px2rem(20);
            border-radius: 50%;
            background: white;
            box-shadow: 0 4px 4px 0 rgba(0,0,0,0.15);
            border: px2rem(1) solid #ddd;
          }
        }
      }
      .text-wrapper{
        font-size: px2rem(14);
        @include center;
      }
    }
  }
  .content-mask{
    position: absolute;
    top: 0;
    left: 0;
    z-index: 101;
    display: flex;
    width: 100%;
    height: 100%;
    background: rgba(51,51,51,.8)
  }
}
</style>